The real number line is a very powerful model for representing relationships between real numbers.

The experimental interactive tools below are designed to help students internalize the number line model.

Adding Integers

Comparing Subtracting an Integer to Adding the Opposite

Comparing the Integer Tile Model to the Real Number Line Model

Comparing the Fraction Strip Model to the Real Number Line Model

Comparing the Pie Chart Model to the Real Number Line Model (Version I)

Comparing the Pie Chart Model to the Real Number Line Model (Version II)

Comparing the Polygonal Area Model to the Real Number Line Model

Comparing All Three Area Models to the Real Number Line Model